Use transform option to make ts test work

package.json

@@ -33,14 +33,24 @@
     "media": "cds watch media",
     "mocha": "npx mocha || echo",
     "jest": "npx jest",
-    "test": "npm run jest --silent --testMatch test/*.test.js && npm run test:ts",
-    "test:ts": "npm run jest --silent --preset ts-jest --testMatch test/*.test.ts"
+    "test": "npm run jest --silent"
   },
   "mocha": {
     "parallel": true
   },
   "jest": {
-    "testEnvironment": "node"
+    "testEnvironment": "node",
+    "transform": {
+      "\\.ts$": "ts-jest"
+    },
+    "globals": {
+      "ts-jest": {
+        "diagnostics": {
+          "_comment": "see https://githubmemory.com/repo/kulshekhar/ts-jest/issues/2722",
+          "ignoreCodes": [151001]
+        }
+      }
+    }
   },
   "license": "SAP SAMPLE CODE LICENSE",
   "private": true

test/hello-world-ts.test.ts

@@ -1,7 +1,8 @@
-const testKit = require('../test')
-process.env.TYPESCRIPT_SUPPORT = 'true';
+process.env.CDS_TYPESCRIPT = 'true';
+import * as cds from '@sap/cds';
 
-const {GET} = testKit.run('serve', 'hello/world.cds')
+//@ts-ignore
+const {GET} =  cds.test.in(__dirname,'../hello').run('serve', 'world.cds')
 
 describe('Hello world!', () => {